I can easily imagine doing stupid things out of anger, but swallowing stones isn't one of them:

A girl from Foshan, China, swallowed down more than 20 cobblestones in a moment of anger after a big quarrel with her boyfriend. Initially, she thought the stones would be flushed out after clearing her bowels, but unfortunately they remained intact within her body for the next few days.

To make matters worse, she constantly felt that the stones were knocking against each other within her stomach which caused some pain and discomfort.